Abstract: A magnetic drive pump includes a pump chamber including an inlet port and an outlet port, a partition wall separating the pump chamber from an exterior, a rotational shaft provided at a side of the pump chamber relative to the partition wall, an impeller rotatably supported by a first end of the rotational shaft, an inductor integrally fixed to the impeller to rotate, a magnetic member positioned radially outside of the partition wall and facing the inductor, the magnetic member rotatably supported, a rotation drive device fixed to the magnetic means and actuating the magnetic member to rotate, and a drive device moving at least one of the magnetic member and the inductor in an axial direction of the rotational shaft.

Abstract: A controllable drive (1) suitable for a motor vehicle coolant pump (2) comprises a rotatably mounted shaft (5), a driven member (7) which is rotationally fixedly mounted on the shaft (5), a driving member (9) which is mounted so as to be rotatable relative to the shaft (5), and a coupling region (7/8) which is arranged between the driving and driven members (9, 7) and holds a viscous fluid. At least one first flow path and at least one second flow path connect a fluid reservoir to the coupling region (7/8), and an actuation device (11a, 11b, 12, 13, 14) changes at least one passage opening of at least one flow path. A coupling housing (8, 8a, 8b) is connected to the driving member (9), and the actuator (14) is arranged within the coupling housing (8, 8a, 8b).

Abstract: A rotary shaft is rotatable relative to a motor rotor. A first end face of the motor rotor is exposed to the outside of a stator. A hammer portion is provided at the first end face. The hammer portion is configured to be movable as the motor rotor rotates. A collision portion rotating integrally with the rotary shaft is configured to collide with the hammer portion. The allowance space between the collision portion and the hammer portion allows the hammer portion to be move relative to the collision portion. Therefore, the electric pump is capable of detaching a rotor from a pump chamber without increasing the size of the pump.

Abstract: A motion-powered liquid sprayer that can increase the number of rotations of the pump relative to each rotation of the wheel or axle is provided. The sprayer can include a gearing assembly that employs gears to increase the number of pump revolutions as a function of the wheel or axle rotation. The sprayer can also include a gear pump that employs an over-capacity or enhanced gullet together with blow-by spacing to control consistent liquid flow relative to variable motional velocities.

Abstract: A device for controlling the activation of an apparatus by a motor, intended to be inserted between, the operation output of the motor and the operation input of the apparatus whose activation is to be controlled. The device includes: —a blade pump having a rotor, at least one blade carried by this rotor and a rotary body forming a pumping chamber missing an outlet, and one of the component parts, among the rotor and the rotary body, being connected to the operation output of the motor, whilst the other of these component parts is connected to the operation input of the apparatus to be controlled; —and a supply intended to supply liquid to the pumping chamber.

Abstract: A portable bulk transfer pump assembly (10) constructed in accordance with the principles of a preferred embodiment of the present invention is configured for transferring fluid (not shown) in bulk. The illustrated portable bulk transfer pump assembly (10) broadly includes a portable housing (12) that carries a pumping assembly (14). The portable housing (12) is sized and configured to both support the pumping assembly (14) and enable the entire pump assembly (10) to be readily and easily manually transported to and from pumping locations. The pumping assembly (14) is configured to pump low, medium, and high viscosity fluids utilizing a single pump (52) and a drive assembly (54) drivingly coupled to the pump (52) and selectively adjustable to operate the pump (52) at varying speeds. The illustrated drive assembly (54) includes a motor (80) and a variable speed transmission (82) disposed between the motor (80) and the pump (52).

Abstract: A plate (13(e)), the outer diameter side of which is fixed to be integral with a plate section (13c), and which is provided with an engagement part (13g) to be engaged with a shoulder (13f) formed on the inner diameter side of a boss section (13a), is integral with a center hub (13). Thereby, even if a bridge section (13d) is broken and the plate section (3c) moves in the detachment direction of the center hub (13), the engagement part (13g) of the plate (13e) is engaged with the shoulder (13f) of the boss section (13a), whereby the plate section (13c) and the boss section (13a) are engaged and coupled with each other while interrupting the torque transmission. Accordingly, even if the bridge section (13d) is broken, the boss section (13a) as well as the plate section (13c) side are prevented from being detached from a pulley (10).

Abstract: An electronics cooling fan comprises a centrifugal clutch adapted to disengage and freewheel upon fan failure.

Abstract: A limited free-motion coupling device 10 coupling an impeller 14 to a shaft 16 of a rotor 12, the coupling device 10 comprising first and second parts 20, 22 which are axially engaged for relative angular displacement about a rotational axis A, and two spherical coupling members 24 for engaging the first and second parts 20, 22 to prevent the said relative angular displacement. One of the first and second parts 20, 22 is provided on the shaft 16 of the rotor 12, and the other is provided on the impeller 14. The first part 20 comprises two spaced coupling member arms 30 which project radially. The second part 22 comprises a cylindrical wall 66 extending coaxially with the rotational axis A of the coupling device 10. Two spaced arcuate channels 50 are formed in the cylindrical wall 66. Each coupling member 24 is received in and projects radially from a respective arcuate channel 50, and is freely movable between end walls of the arcuate channel 50.

Abstract: Circulation systems for ponds, lakes, or other bodies of water using a flotation platform, dish, and impeller. One embodiment has a connecting arrangement between the drive motor and the impeller that permits the two to be easily and quickly coupled and uncoupled. The connecting arrangement also is designed to accommodate slight misalignments between the shafts. An arrangement to adjust and calibrate the depth of the inlet to the draft tube is disclosed. The system further includes solar panels that can be pivotally swung outwardly to open positions, angularly adjusted about a horizontal axis, and mounted to face toward the central axis of the flotation platform rather than away from it. Arrangements are further provided to monitor and control the components of the system including remotely from shore.

Abstract: Method and apparatus for reducing the pumping duty cycle of a pump assembly associated with an oil, natural gas, or water well with a concomitant reduction in the wear associated with the pump down hole components. An engine is connected with a pump assembly through a pneumatically actuated clutch and a selected event is determined to actuate the clutch to connect the engine with the pump assembly. The selected events may be a timed cycle determined from observations or a direct determination of liquid level in the well bore so that hydrocarbon production is maintained from the well bore. A pressurized gas is supplied on the occurrence of the selected event to actuate the clutch to connect the pump assembly with the engine to remove liquid from the gas well to maintain hydrocarbon production from the well.

Abstract: A compressor provided with a torque limiter constructed such that, in view of possible occurrence of accidental locking of the compressor, in the case where a one-way clutch is used in place of an electromagnetic clutch in order to permit a refrigerant compressor for a vehicle air-conditioning system to be driven by an electric motor instead of an internal combustion engine, when an excessive torque is to be transmitted by the one-way clutch, rollers ride over wedge surfaces and fall into pocket sections, or sprags are reversed to roll-over.

Abstract: A power transmission device which interrupts torque transmission when the torque exceeds a predetermined torque. A torque limiter includes projections formed on a center hub and a pulley. The center hub includes bridges that transmit torque by a pulling force. When a preset torque limit is reached, the projections on the center hub make contact with and move along slanted faces so as to move the center hub in an axial direction relative to the pulley. The bridges are thereby subjected to a bending moment in addition to the pulling force when the torque exceeds the preset torque level, so that the bridges break precisely above the preset torque level due to the reduced fatigue limit.

Abstract: This invention relates to a pumping system. The design of the system is such that bi-directional operation can be achieved using a significantly smaller and hence lighter unit than those currently available. It uses the direction of rotation of the drive shaft to control the opening and closure of the by-pass means for controllably returning the fluid to the first reservoir.

Abstract: A compressor impeller for use with a boreless turbocharger is provided in accordance with this invention. The compressor impeller comprises an integral hub projecting axially therefrom that includes a partial bore therein that extends from an open to a close bore end. The bore includes a threaded portion that is configured to accommodate threaded engagement with an end of a common shaft disposed through a turbocharger housing and attached at an opposite end to a turbine wheel. The hub is specially configured so that the threaded portion has a relatively increased wall thickness when compared to a remaining portion of the bore disposed between the threaded portion and the end of the bore. The bore is configured providing a section having a reduced wall thickness, between the threaded portion and the bore closed end, for purposes of providing a preferential stress relief mechanism.

Abstract: In a torque transmission system, plural engagement pieces elastically deformable are formed integrally with an outer peripheral portion of a circular portion of a center hub to be engaged with an inner periphery portion of a pulley. A bridge portion of the center hub is disposed to be broken when a torque large than a predetermined torque is applied there to. Since the engagement protrusion pieces are engaged with a part of the pulley, it can prevent the center hub from being removed and falling when the bridge portion of the center hub is broken.

Abstract: A dual drive system for a hydraulic pump and an air boost compressor is provided. Reversible power is transmitted to a shaft connected to clockwise and counterclockwise over-running clutches connected to different vehicle or equipment subsystems. Reversing the drive allows power to be alternately transmitted to one or the other of the subsystems. The invention includes utilizing the dual drive for hydraulic and air conditioning systems for an aircraft, with the provision of an additional drive motor providing constant power to one or more of the subsystems.

Abstract: The invention concerns a metering gear pump comprising a set of gears supported and guided solely by the inner peripheral surface of the lobe of the chamber wherein they are housed. They do not comprise any shaft to act as support or guide, thereby enabling to reduce significantly useless spaced difficult to rinse when changing the product to be pumped. For the same purpose, the driving shaft is flexibly connected to the driving gear. Such arrangement provides the advantage of requiring only one single packing seal. Such a pump, connected to a drive motor and an encoder delivering a signal proportional to the number of pump cycles, enables to provide an accurate metering pump for numerous uses.

Abstract: An object of the invention is to minimize energy loss to be generated at a driving shaft and a shaft seal device, when an electric rotating device is driven by an expansion-and-compressor device. According to a feature of the invention, a first driving shaft is rotationally supported by a housing and transmits a driving force from an engine to a second shaft of the expansion-and-compressor device, wherein a shaft seal device is provided on the first driving shaft for air-tightly sealing the inside of the housing from the outside of the housing. A power transmission control device (electromagnetic clutch or one way clutch) is operatively provided in a path between the first driving shaft and the second shaft, so that power transmission from the second shaft to the first driving shaft is cut off, to suppress any energy loss to be generated between the first driving shaft and the shaft seal device.

Abstract: A gas turbine engine 10 includes an intermediate pressure compressor 14 connected to an intermediate pressure turbine 22 by a driveshaft 28. The driveshaft 28 comprises a downstream turbine shaft 34 attached to the intermediate pressure turbine 22 and an upstream compressor shaft 32 attached to the intermediate pressure compressor 14. The compressor shaft 32 and turbine shaft 34 are connected together by a splined connection 36 which allows the turbine shaft 34 to drive the compressor shaft 32. If the splined connected 36 should fail, so that it no longer transmits torque, a further splined connection 41 comes into operation to transmit torque between the turbine shaft 34 and compressor shaft 32. When this happens, torque is transmitted via a torsionally weakened, shear section 48 of the turbine shaft 34 which tends to break under certain engine conditions. The turbine shaft 34 is then released axially and turbine overspeed is restrained.

Abstract: An artificial lift system used to produce fluids from boreholes such as oil and gas wells. The system uses a progressive cavity (PC) downhole pump system which can be inserted into the borehole, seated, operated, flushed and removed using conventional or coiled sucker rod tubing. The progressive cavity pump system includes a tubular body with a stator and a rotor within the stator. The rotor is connected to a rotatable string on one end and an arrowhead assembly on the other. A seating mandrel assembly maintains the rotor within the stator. The seating mandrel assembly has a component configured to engage with the arrowhead assembly so that the pump may be removed from a downhole location.

Abstract: A hydrostatic axial piston machine has a cylinder block with bores holding reciprocating pistons, a swashplate supporting the pistons, and control cams to supply the bores with hydraulic fluid. The swashplate is a pivoting cradle mounted on friction bearings in a cradle receptacle. Hydraulic fluid channels empty into the cradle receptacle and are in communication with supply channels in the cradle connected to the control cams. An actuator piston to adjust the cradle is located between two friction bearing segments of the cradle receptacle and has a toothed rack segment engaging a gearing segment on the back side of the cradle.

Abstract: When an electric appliance unit functions as an electric motor, a rotary shaft is rotated by electric current supplied to the electric appliance unit. When the electric appliance unit functions as a generator, the generator generates electricity as the rotary shaft rotates. A first rotation permitting mechanism is located between the rotor and the rotary shaft to permit the rotor and the rotary shaft to rotate relative to each other. A one-way clutch is located between the rotor and the rotary shaft. The one-way clutch permits the rotary shaft to rotate in one direction relative to the rotor and prevents the rotary shaft from rotating in the other direction relative to the rotor. A second rotation permitting mechanism is located between the housing and the rotor. The second rotation permitting mechanism permits the rotor to rotate relative to the housing. Power transmitted from the external drive source to the rotor is transmitted to the rotary shaft via the one-way clutch.

Abstract: A power transmission mechanism has a first rotating member rotating around an axis, a second rotating member rotating around the axis and an elastic member located between the first rotating member and the second rotating member. The first rotating member has a first rotating member surface, and the second rotating member has a second rotating member surface. The elastic member has at least a protrusion contacting at least the first rotating member surface. The protrusion extends in a circumferential direction of the first rotating member. The protrusion has gradually tapering shape toward the first rotating member surface. The elastic member is deformed by compression as the elastic member engages the first rotating member surface and the second rotating member surface by rotation of the first rotating member, thereby causing relative rotation of the first rotating member and the second rotating member.

Abstract: A hydrostatic pump-motor unit (35) including a clutch assembly (43) and a pump-motor portion (45) disposed within a housing assembly (51,55,57). An intermediate drive shaft (21) extends through the entire axial extent of the unit (35) and is surrounded by a hollow shaft member (63). The housing assembly (51,55,57) supports the drive shaft (21) by means of a pair of bearing sets (67,71), and the hollow shaft member (63) is supported relative to the housing assembly by means of a pair of bearing sets (75,79). The pump-motor portion (45) includes an axial piston cylinder barrel (115) surrounding the shaft member (63) and splined thereto. The clutch assembly (43) is operable to selectively clutch and de-clutch the drive shaft (21) and the hollow shaft member (63). Having the drive line extend through the pump-motor unit (35) substantially improves the packaging of the overall drive system.

Abstract: A fluid coupling is provided between a pump shaft of a water pump and a water pump pulley and includes a liquid chamber formed inside housings and filled with a fluid, and a rotor fixed to the pump shaft and housed in the liquid chamber. When the housings connected to a crank pulley via an endless belt rotate, the rotor is dragged by the viscosity of the fluid and the pump shaft rotates. Since the fluid coupling has the property of decreasing the rate of increase in the output rotational speed of the fluid coupling as the input rotational speed increases, the required rotational speed of the water pump can be guaranteed when the rotational speed of the engine is low, and the water pump can be prevented from rotating excessively when the rotational speed of the engine is high.

Abstract: A power pump device includes a casing having a motor and a gear system is connected to an output shaft of the motor. A final gear of the gear system is mounted to an axle and a knob is rotatably and threadedly connected to the casing. A first spring is mounted to the axle and biased between the final gear and an inside of the knob. A disk is mounted to the axle and a clutch device is engaged between the final gear and the disk. A crank is connected to the axle and connected to a piston rod which reciprocatingly moves in a cylinder so as to output pressurized air. The clutch device makes the final gear to slide on the disk when a back pressure overcomes the spring biasing the final gear.

Abstract: A compressor for an air conditioning system in an automobile, having a housing (1) and a compressor unit (2) accommodated in the housing (1) for taking in and compressing a refrigerant. The refrigerant flows from an intake area (4) preferably in a front-end housing cover (3) through the compressor unit (2) into a discharge area (5), preferably likewise designed and constructed in the housing cover (3). The compressor is designed and constructed for promoting efficiency such that components coming into contact with the refrigerant, particularly the walls forming a flow path (6) between the intake area (4) and the discharge area (5) are thermally insulated against the refrigerant at least partially and in areas of contact. For an effective protection of the drive belt when the drive shaft or the compressor unit locks, the compressor is further designed and constructed such that a coupling device automatically disengages, when a defined thermal and/or mechanical load limit is exceeded.

Abstract: An interruptible power transmission mechanism couples a drive source to a compressor. The power transmission mechanism has a pulley, which rotates in synchronism with the drive source, and a receiving member, which rotates in synchronism with the compressor. A limit spring couples the pulley and the receiving member such that they rotate together. When the load torque of the compressor exceeds a predetermined value, the diameter of the limit spring is decreased so that the limit spring engages a rib provided on the receiving member. Then, the deformation of the limit spring in the radial direction is locally restricted, causing stress at a specific portion of the limit spring to increase rapidly. As a result, the limit spring is reliably broken at a torque near the desired load torque, thus interrupting power in a desirable manner.

Abstract: A variable displacement piston pump/motor has a simple, compact structure that is suited for use as an oil-pressure generating device for machine presses and the like. In the variable displacement piston pump/motor, a flywheel and a rotation shaft of a pump device are disposed and connected concentrically.

Abstract: A dustproof implement applied to a clutch to be attached to a compressor in an air-conditioning system loaded on a working vehicle, comprises a plate to be disposed opposite to an annular recess of a rotor of the clutch and fixed at the compressor, and an annular pad attached to the annular plate and abutting the rotor on the outer peripheral side of the annular recess of the rotor.

Abstract: A torque limiting mechanism includes an axial space formed in a cylindrical wall of a pulley, and a pin protruding and extending from a back surface of a discharge disc. The pin is inserted into the axial space, and a rubber damper is installed between the inner surface of the axial space and the pin. When torque difference between the pulley and the discharge disc exceeds a threshold, a root portion of the pin is broken to separate the discharge disc from the pulley, thereby interrupting rotation transmission from the pulley to the discharge disc.

Abstract: A method and apparatus for hydraulically engaging and disengaging a hydraulic motor comprising a rotor and a stator.

Abstract: An electromagnetic clutch (10) for an air conditioning compressor includes a generally cylindrical pulley (11) rotatably mounted on a compressor housing (16) and having an annular friction surface (21b), a driven member (12) mounted on a compressor shaft (13) and having an annular friction surface (21a) positioned radially adjacent the first friction surface to form an annular space (21c) therebetween. A quantity of flowable magnetic material (27) is provided in the annular space (21c) and a magnetic coil (34) is fixed on the housing adjacent thereto. A control (40,46,46′) connected to the magnetic coil (34) supplies electrical power from a power supply (47) to energize the magnetic coil and create magnetic flux in the annular space (21c) polarizing the magnetic material and frictionally coupling the first and second friction surfaces (21a,21b) to cause the pulley (11) to rotate the driven member (12).

Abstract: A compressor for an air-conditioning system of a motor vehicle is proposed, which has a controllable compression medium feed mechanism powered by a drive shaft and which, for example, is powered by the combustion engine of the motor vehicle by a belt driven by a drive shaft, where the belt is coupled with the drive shaft of the compressor. The compressor is characterized by the drive wheel (29) having a belt pulley body (31) engaged with the belt (33) and coupled via an elastic coupling element (35) with the drive shaft (7), and by the drive shaft (7) being equipped with a torque limiting mechanism (predetermined fracture point (65)). In the case of another version, it is envisaged that the support mechanism (127) contains a projection (137) protruding from the take-up plate (11) and preferentially forming a single piece with this, as well as a supporting element (139).

Abstract: A water system includes a reciprocating pump operated by pedal and motor delivered solar power, including one-way engagement clutch elements preventing hazardous pedal movement and potential motor damage. The pumpstand includes a housing in which a foot pedal and a drive shaft rotate. An eccentric pin, rotating with the drive shaft, moves a connecting rod, which in turn causes a pushrod to oscillate vertically. The pushrod extends into a pressure-tight chamber formed above the rising main (well pipe). A pumprod connected to the pushrod extends to move a conventional plunger through vertical oscillations. A flywheel is attached to the drive shaft, and a counterweight is mounted on the flywheel diametrically opposite the eccentric pin. The radial distance from the drive shaft to the counterweight can be adjusted. A discharge pipe extends from the pressure-tight chamber to an elevated or pressurized storage tank.

Abstract: The hydraulic pump has a rotor which rotates together with an input shaft linked with an automobile's engine, and generates a hydraulic pressure to be applied to a hydraulic actuating apparatus on the automobile. The hydraulic pump also has a transmission unit provided between a rotating shaft of the rotor and the input shaft so as to change a transmission ratio therebetween, and a hydraulic clutch which changes the transmission unit by means of the hydraulic pressure generated at a discharge side of a pump main body so as to apply the pressure to the apparatus. Therefore, the transmission according to an operating state of the apparatus and a rotational speed of the engine can be realized with a simple constitution and no requirement for a sensor for detecting a running state and a controller for controlling according to the detection.

Abstract: A pump drive assembly is disclosed. The assembly includes a driver, a pump drive member driven by the driver, and a decoupler that decouples the drive member from the driver when a force acting upon the drive member exceeds a threshold force. The pump drive member can be a piston rod, and the decoupler can be a magnet attached to the piston rod and coupled to a magnetically attracted plate driven by the driver. When a force resisting movement of the piston rod exceeds the magnetic force coupling the magnet to the plate, the magnet decouples from the plate, and the pumping operation ceases.

Abstract: The blood pump (BP) has an elongate tubular pump housing (10) wherein a motor (16) is arranged that drives a pump impeller wheel (22), the pump housing having an inlet (12) at one end and an outlet (18) at the opposite end. The motor (16) comprises a motor housing (15) sealed off against the blood flow. The pump impeller wheel (22) is located at the end of the motor housing (15) facing the inlet (12) and, together with a transition portion (13) of the pump housing (10), forms a rotary pump flown through diagonally, which creates an axial flow flowing around the motor housing (15). Here, the blood flow exclusively flows between stationary parts, thereby reducing the risk of blood decay caused by shear stresses.

Abstract: A shaft coupling system (10) is used to connect one shaft (23) to another shaft (44). The system (10) is suited for use in the environment of a pump (11) having a motor assembly (12) and a disposable pump assembly (13). The shaft (23) is driven by a motor (15) and carries a drive coupling device (24). The shaft (44) of the pump assembly (13) carries an impeller (47) at one end and a driven coupling device (49) at the other end. The drive coupling device (24) includes lugs (55) having helical guide surfaces (57, 58) and a helical drive surface (56). The driven coupling device (49) includes fingers (64) having helical guide surfaces (66, 67) and a helical driven surface (65). When the coupling devices (24, 49) are axially engaged, the guide surfaces (57, 58 and 66, 67) may engage each other and rotate the coupling devices (24, 49) relative to each other to position the fingers (64) between the lugs (55).

Abstract: A compressor having a rotating member, which includes a drive shaft and a swash plate. A piston compresses gas and torsionally vibrates the rotating member. A damper is coupled to the shaft to reduce torsional vibrations of the rotating member. The natural frequency of the damper is substantially equal to that of the rotating member. The damper includes a metal pin coupled to the shaft, a weight coupled to the rotating member, and a rubberlike body arranged between the shaft and the weight. The pin functions as a spring acting in the direction of the torsional vibrations and has a spring constant that remains substantially the same within the operating temperature range of the compressor. The weight is vibrated torsionally with the rotating member by the pin to offset the torsional vibrations of the rotating member. The natural frequency of the damper is determined mainly by the mass of the weight and the spring constant of the pin.

Abstract: A dry-pit submersible pump using a totally enclosed fan-cooled (TEFC) electric motor to power the pump. A release mechanism prevents the fan from creating excessive drag when submerged in water. The fan cools the motor when the water level is below the motor, and the surrounding water combines with the fan to cool the motor when the water level rises to at least partially surround the motor. When the fan is at least partially submerged, the release mechanism substantially prevents the fan from imposing a load on the motor due to the surrounding water. The release mechanism can take the form of a shear key, a torque-release clutch or flexible fan blades.

Abstract: A mechanical seal combination includes a double mechanical seal and a barrier fluid pump system. A barrier fluid circulating pump 10 is coupled to rotatable shaft 3 so as to derive its motive power from the rotatable shaft. When the rotatable shaft is not running, a by-pass arrangement causes barrier fluids to flow between the barrier fluid header tank 7 and the seal 3, avoiding pump 10, and allowing a thermosyphon effect to be created.

Abstract: A torque limiting apparatus is located between a power source and a driven apparatus. A number of breakable power transmission members connect a drive rotor to a driven rotor. The breakable members are fractured to disconnect the driven rotor from the drive rotor when the load applied by the driven apparatus exceeds a predetermined value. A promoting member is located near at least one of the power transmission members for promoting breakage when the load causes the driven rotor to rotate relative to the drive rotor. The breakable members are broken consecutively. The breakable members are not significantly affected by fatigue.

Abstract: A compressor for an air-conditioning system of a motor vehicle is proposed, which has a controllable compression medium feed mechanism powered by a drive shaft and which, for example, is powered by the combustion engine of the motor vehicle by a belt driven by a drive shaft, where the belt is coupled with the drive shaft of the compressor. the compressor is characterized by the drive wheel (29) having a belt pully body (31) engaged with the belt (33) and coupled via an elastic coupling element (35) with the drive shaft (7), and by the drive shaft (7) being equipped with a torque limiting mechanism (predetermined fracture point (65)). In the case of another version, it is envisaged that the support mechanism (127) contains a projection (137) protruding from the take-up plate (11) and preferentially forming a single piece with this, as well as a supporting element (139).

Abstract: A coupling device for coupling a rotor and an impeller of an electric pump has a coupler body 41 fixed to a shaft of the rotor and accommodated within a cavity 31 of the impeller 11. The body 41 comprises a cylindrical portion 43 and a flange 42 located at one end of the cylindrical portion 43. The cavity 31 has an inner section 32 accommodating the cylindrical portion 43 of the body and an outer section 33 of larger diameter accommodating the flange 42. The flange 42 has a groove 46 on a surface facing the impeller 11. The impeller has two grooves 36 on a surface confronting the flange, the grooves 36, 46 co-operating to form two arcuate tunnels of circular cross-section. Inside each tunnel is located a spherical ball 50. Rotation of the impeller with respect to the body causes the balls to move along the grooves until at least one tunnel is reduced in length to the diameter of the ball whereby further relative rotation in the same direction between the impeller and coupler body is prevented.

Abstract: A pump or compressor wherein the volumetric displacement of a piston cylinder assembly is variable. The piston is connected to a crank slider or eccentric mechanical drive, the crankshaft of which oscillates alternately clockwise through a controllably variable angle .theta. and counterclockwise through substantially the same angle .theta., the angle .theta. being measured from the angular position of the crankshaft or eccentric at which separation between piston and the closed end of the bore is a minimum (Top Dead Center). The angle of crank oscillation controls the degree of volumetric displacement of the piston. The crank shaft is connected to a torsional spring so as to substantially resonate the rotational inertia of the moving parts. An oscillating electric motor supplies the oscillating torque to drive the mechanism at constant frequency but controllably variable angular amplitude.

Abstract: A refrigerant compressor includes a drive shaft, a pulley fixedly fitted on the drive shaft, over which is passed a torque-transmitting member for transmitting torque from an external drive source to the drive shaft, and a compression rotational member mounted on the drive shaft for rotation in unison with the drive shaft to enable compression of a refrigerant gas. The pulley has a rim in the form of a hollow cylinder, over which is passed the torque-transmitting member, a boss which is fixedly fitted on the drive shaft, and a support member connecting the rim and the boss. A breakaway portion is provided in the support member or the drive shaft for breaking to disconnect the torque-transmitting member from the compression rotational member when a load torque larger than a predetermined value is applied to the breakaway portion.

Abstract: A pump (10) is disclosed including an integral clutch and including a housing (26) divided into a clutch zone and a pump zone by a dividing wall (58). An input shaft (12) including a clutch spider (16) is rotatably mounted by a ball roller bearing (54) to a clutch end plate (50). An output shaft (14) is rotatably mounted by linear roller bearings (62, 76) to a pump end plate (68) and the dividing wall (58). A disk pack (20) is slideably mounted to the clutch spider (16) and the output shaft (14) and sandwiched by a piston (34) moved by fluid pressure outward relative to a pressure cylinder (36) and against a pressure plate (28) removably connected to the axial end of the output shaft (14). Thus, axial clutch actuation loads are transmitted only through the disk pack (20) and not to any of the bearings (54, 62, 76). The free axially outer end of the output shaft (14) extends through the pump zone and is located in the pump end plate (68).

Abstract: A centrifugal pump, particularly for fountains and aquariums, for which an electric motor and a pump are disposed coaxially to one another, the electric motor being constructed as a single-phase synchronous motor with a permanent magnet rotor and connected with an open impeller of the pump with impeller blades, which are bent back from a hub towards the outside spirally with respect to a specified direction of rotation, is improved in the direction of a simple and inexpensive production as well as a compact and robust construction without a significant loss in overall efficiency owing to the fact that the impeller blades are constructed flexibly in such a manner that, if the synchronous motor starts counter to the specified direction of rotation, they are propped open by at least 2% in the radial length.